100-line direct-access crossbar telephone switching unit



Jan. 27, 1959 E. J. LgoNARD 26 Sheets-Sheekl 1 Filed MaICh 8, 1954 Jan. 27, 1959 E. J. LEONARD 10o-LINE DIRECT-ACCESS cRossAR TELEPHONE swITcHING UNIT 26 Sheets-Sheet 2 Filed March 8, 1954 Jan. 27, 1959 E. J. LEONARD 2,871,297

IREcT-Accss cRossBAR TELEPHONE swIToHING UNIT 1D0-LINE D 26 Sheets-Sheet 3 Filed March 8. 1954 Jan. 27, 1959 E. J. LEONARD 2,871,297

10o-LINE DIRECT-ACCESS CROSSBAR TELEPHONE SWTCHING UNIT Filed March 8, 1954 2e sheets-sheet 4 rh... mo.

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Filed March 8, 1954 E. J. LEONARD 10G-LINE DIRECT-ACCESS CROSSBAR TELEPHONE SWITCHING UNIT 26 Sheets-Sheet 5 Jan. 27, 1959 E. J. LEONARD '2,871,297

10o-LINE DIRECT-ACCESS CROSSBAR TELEPHONE vSWITCHING UNIT Filed March 8. v1954 26 Sheets-Sheet 6 Jan. 27, 1959 E. J. LEONARD 1GO-LINE D1RECTACCESS CROSSBAR TELEPHONE SWITCHING UNIT 26 Sheets-Sheet '7 Filed March 8. 1954 Jan. 27, 1959 E. J. LEONARD 2,871,297

loo-LINEDIREcT-Accss cRossB/m TELEPHONE swITcHING UNIT Filed March 8, 1954 26 Sheets-Sheet 8 Jan. 27, 1959 E. J. LEONARD 2,871,297

10o-LINE DIRECT-ACCESS CROSSBAR TELEPHONE SWITCHING UNIT 26 Sheets-Sheet 9 Filed March 8, 1954 Jan. 27, 1959 E. J. LEONARD 1D0-LINE DIRECT-ACCESS CROSSBAR TELEPHONE SWITCHING UNIT 26 Sheets-Sheet 10 Filed March 8, 1954 Jan. 27, 1959 E. J. LEONARD 10D-LINE DIRECTACCESS CROSSBAR TELEPHONE SWITCHING UNIT 26 Sheets-Sheet 1l Filed March 8. 1954 TO/FROM SWLTCHING RELAYS 600 oov mdm wznomw mz: zoEBb/onv Jan. 27, 1959 J. LEONARD 2,871,297

lOO-LINE DIRECTACCESS CROSSBAR TELEPHONE SWITCHING UNIT FRoM LINE AND GRouPINe RELAY 40o Jan. 27, 1959 E. J. LEONARD 2,871,297

10o-LINE DIRECT-ACCESS CROS-SBAR TELEPHONE SWITCHING UNIT Jan. 27, 1959 E. J. LEONARD lOO-LINE DIRECT-ACCESS CROSSBAR TELEPHONE SWITCHING UNIT Filed March 8, 1954 26 Sheets-Sheet 14 Jan. 27, 1959 E. J. LEONARD 10o-LINE DIRECT-ACCESS cRossBAR TELEPHONE swITcHING UNIT FiledMarch s, 1954 26 Sheets-Sheet 15 Jan. 27, 1959 E. J. LEONARD lOO-LINE DIRECT-ACCESS CROSSBAR TELEPHONE SWITCHING UNIT 26 Sheets-Sheet 16 jmm:

Filed March 8, 1954 hmm E. J. LEONARD Jan. 27, 19549 lOO-LINE DIRECT-ACCESS CROSSBAR TELEPHONE SWITCHING UNIT 26 Sheets-Sheet 17 Filed March 8, 1954 Jan. 27, 1959 E. J. LEONARD l 2,871,297

1GO-LINE! DIRECT-ACCESVS CROSSBAR TELEPHONE SWITCHING UNIT Filed March 8, 1954 26 Sheets-Sheet 18 Jan. 27, 1959 E. J. LEONARD 1GO-LINE! DIRECT-ACCESS CROSSBAR TELEPHONE SWITCHING UNIT 26 Sheets-Sheet 19 Filed March 8, 1954 Toom;

Jan. 27, 1959 E. J. LEONARD 2,871,297

10o-LINE DIRECT-ACCESS CROSSBR TELEPHONE SWITCHING UNIT Filed March 8. 1954 26 Sheets-Sheet 20 TO/FROM PRECEEDING SWITCH 

